Equipment mounting racks and cabinets

ABSTRACT

An equipment mounting rack is composed of a seismically sound skeleton structure having spaced vertical uprights supplemented by distinct spaced equipment mounting structures attached to that skeleton structure and extending along these vertical uprights and constituting side wall structures of a mounting rack interior space. The distinct spaced equipment mounting structures may have elongate first sections extending along the spaced vertical uprights, and elongate second sections extending along these first sections and constituting side wall structures of a mounting rack interior space. Cabinet walls may be attached to the skeleton structure, and the equipment mounting structures may constitute inside such cabinet walls side wall structures of a mounting rack interior space. The vertical uprights advantageously are reinforced by elongate partial enclosures that may avoid the need for a large number of weakening mounting holes in these uprights.

CROSS-REFERENCE TO RELATED APPLICATION

This is a division of patent application Ser. No. 09/103,347, filed Jun.23, 1998 by the herein inventors, Richard W. Sevier and Dominic J.Louwagie, and incorporated by reference herein.

FIELD OF THE INVENTION

The subject invention relates to seismically sound equipment mountingracks and cabinets.

BACKGROUND OF THE INVENTION

There is a wide variety of equipment mounting racks and cabinets; butthe need persists for more versatile rack and cabinet systems that arehighly resistant to earthquakes and other calamities.

SUMMARY OF THE INVENTION

It is a general object of the invention to provide improved equipmentracks and cabinets.

It is a germane object of the invention to provide versatile equipmentracks and cabinets that comply with requirements of standardization orthat otherwise fit standard or recurring environments.

It is a related object of the invention to provide earthquake-resistantequipment racks and cabinets.

The invention resides in an equipment mounting rack composed of aseismically sound skeleton structure having spaced vertical uprightssupplemented by distinct spaced equipment mounting structures attachedto that skeleton structure and extending along these vertical uprightsand constituting side wall structures of a mounting rack interior space.

The invention resides also in an equipment mounting rack composed of aseismically sound skeleton structure having spaced vertical uprightssupplemented by distinct spaced equipment mounting structures havingelongate first sections extending along these spaced vertical uprights,and elongate second sections extending along these first sections andconstituting side wall structures of a mounting rack interior space.

From another aspect thereof, the invention resides in an equipmentmounting rack comprising, in combination, a seismically sound skeletonstructure having spaced vertical uprights, spaced equipment mountingstructures attached to that skeleton structure and extending along thesevertical uprights, and cabinet walls attached to that skeletonstructure, such equipment mounting structures constituting, inside thesecabinet walls, side wall structures of a mounting rack interior space.

From a further aspect thereof, the invention resides in an equipmentmounting rack comprising, in combination, a seismically sound skeletonstructure having spaced vertical uprights, and each of said verticaluprights having an elongate upright partial enclosure extendingthroughout said partial enclosure, said partial enclosure having a mainsection extending in parallel to a main section of the correspondingvertical upright, a first lateral section extending from that mainsection in spaced relationship to a first side of that vertical uprightand having a first extension engaging that first side of that verticalupright, and an opposite second lateral section extending from the mainsection in spaced relationship to an opposite second side of thatvertical upright and having a second extension engaging that second sideof that vertical upright.

From another aspect thereof, the invention resides in an equipmentmounting rack comprising, in combination, a seismically sound skeletonstructure having spaced vertical uprights, a cross piece structureattached to and extending between these vertical uprights, and forming acorner at a top of each of said vertical uprights and between each ofsaid vertical uprights and said cross piece structure a strut plateextending inside of that vertical upright and inside said cross piecestructure in spaced relationship to said corner at an angle between eachof these vertical uprights and that cross piece structure from alocation on the vertical upright spaced along that vertical uprightdownwardly from that top to a location on said cross piece structurespaced along the cross piece structure from both of said spaced verticaluprights.

From a further aspect thereof, the invention resides in an equipmentmounting rack comprising, in combination, a seismically sound skeletonstructure having spaced vertical uprights, a cross piece structureattached to and extending between such vertical uprights, and a strutplate extending at an angle between each of these vertical uprights andthat cross piece structure. Each of these vertical uprights has anelongate upright partial A enclosure having a main section extending inparallel to a main section of that vertical upright, a first lateralsection extending from such main section in spaced relationship to afirst side of that vertical upright and having a first extensionengaging that first side of that vertical upright, and an oppositesecond lateral section extending from the main section in spacedrelationship to an opposite second side of that vertical upright andhaving a second extension engaging that second side of that verticalupright.

From a farther aspect thereof, the invention resides in an equipmentmounting rack comprising, in combination, a seismically sound skeletonstructure having spaced vertical uprights, each of these verticaluprights having an elongate upright partial enclosure having a mainsection extending in parallel to a main section of that verticalupright, a first lateral section extending from that main section inspaced relationship to a first side of that vertical upright and havinga first extension engaging that first side of that vertical upright, andan opposite second lateral section extending from such main section inspaced relationship to an opposite second side of that vertical uprightand having a second extension engaging that second side of that verticalupright; and distinct spaced equipment mounting structures attached toeach elongate partial upright enclosure of the vertical uprights andconstituting side wall structures of a mounting rack interior space.

From a further aspect thereof, the invention resides in an equipmentmounting rack comprising, in combination, a seismically sound skeletonstructure having spaced vertical uprights, a cross piece structureattached to and extending between such vertical uprights and forming acomer at each of these vertical uprights, and, between each of thesevertical uprights and the cross piece structure, a strut plate extendinginside of that vertical upright and inside such cross piece structure inspaced relationship to that corner at an angle from a location on thatvertical upright spaced from that corner to a location on the crosspiece structure spaced from that corner; each of the vertical uprightshaving an elongate upright partial enclosure having a main sectionextending in parallel to a main section of that vertical upright, afirst lateral section extending from that main section in spacedrelationship to a first side of that vertical upright and having a firstextension engaging that first side of that vertical upright, and anopposite second lateral section extending from that main section inspaced relationship to an opposite second side of that vertical uprightand having a second extension engaging that second side of that verticalupright.

BRIEF DESCRIPTION OF THE DRAWINGS

The subject invention and its various aspects and objects will becomemore readily apparent from the following detailed description ofpreferred embodiments thereof, illustrated by way of example in theaccompanying drawings which also constitute a written description of theinvention, wherein like reference numerals designate like or equivalentparts, and in which:

FIG. 1 is a partially exploded perspective view of an equipment mountingrack according to an embodiment of the invention;

FIG. 2 is a detail view including a section taken on the line 2—2 inFIG. 1, on an enlarged scale;

FIG. 3 is a modification according to an embodiment of the inventionillustrated on an enlarged scale with the aid of a us section similar toa detail of FIG. 2;

FIG. 4 is a section taken on the line 4—4 in FIG. 1;

FIG. 5 is a detail view on an enlarged scale of a component within thecircle 5 in FIG. 1;

FIG. 6 is a detail view on an enlarged scale of that component withinthe circle 6 in FIG. 1;

FIG. 7 is a partially exploded perspective view of a cabinet includingan equipment mounting rack according to an embodiment of the invention;and

FIG. 8 is a perspective view similar to FIG. 7 showing the assembledcabinet enclosing the equipment mounting rack in a shut condition.

DESCRIPTION OF PREFERRED EMBODIMENTS

An equipment mounting rack 10 is composed of a seismically soundskeleton structure 12 having spaced vertical uprights 13 and 14supplemented by distinct spaced equipment mounting structures 16 and 17attached to the skeleton structure and extending along the verticaluprights. These equipment mounting structures 16 and 17 in effectconstitute side wall structures of a mounting rack interior space 18 inlateral extension of the vertical uprights, such as seen in FIGS. 1 and2, and include means 43 for mounting equipment 20 and 21, such as seenin FIGS. 2 and 5 to 7.

Various pieces of equipment can be mounted on the structures 16 and 17.By way of example and not by way of limitation, FIGS. 2 and 7 show amounting board 20 attached to the opposite mounting structures 16 and17. Squares 21 in that mounting board either represent apertures forreceiving equipment or symbolize equipment that may be mounted on theboard 20 and thereby indirectly on the structures 16 and 17 in the rackinterior 18. However, such or other equipment may be mounted on thestructures 16 and 17 directly, as may various fiber optics or otherlines, cables, wiring, etc.

In this respect and in general, the rack structure according to theinvention is of wide utility, including facilities for mountingelectrical and/or electronic equipment, facilities for mounting gassupply or transmission equipment, and facilities for mounting liquidfuel supply or transmission systems, or facilities for mountingfire-fighting equipment, hospital equipment and supplies, food and drinksurvival rations, and other articles, commodities and supplies neededfor endurance of heavy earthquakes and other disasters, to name but afew examples where seismic stability and endurance are essential,especially in seismically active areas of the world.

The spaced equipment mounting structures 16 and 17 may be spaced fromvertical uprights 13 and 14, or may be attached to such spaced verticaluprights.

According to an embodiment of the invention, the vertical uprights 13and 14 have elongate partial enclosures 23 extending along thesevertical uprights, such as shown in FIG. 2 on an enlarged scale for thevertical upright 13 of the seismically sound skeleton structure 12. Asseen in FIGS. 1, 4 and 7, each such vertical upright extends throughoutsuch partial enclosure. The spaced equipment mounting structures 16 and17 may be attached to these elongate partial enclosures, such as shownat 24 in FIG. 1, indicating fasteners 25 and recurrent mounting holes125 in said elongate partial enclosures, rather than in said verticaluprights. In this manner, any penetration or other weakening of uprights13 and 14 of the seismically sound skeleton structure 12 by recurrentmounting holes or similar fastening devices can effectively be avoidedsuch as seen from FIGS. 2 and 3. Also, the partial enclosure 23 addsstrength to the upright structure and avoids damage to cables andwiring, as more fully disclosed below.

Such partial enclosures may also be provided about, other seismicallysound structures. By way of example, and not by way of limitation, eachof the vertical frame members of the equipment rack shown in U.S. Pat.No. 5,004,107, by coinventor Richard W. Sevier and by James J. Keenan,issued Apr. 2, 1991 to assignee Hendry Mechanical Works, may be equippedwith such a partial enclosure.

According to the embodiment of the invention illustrated in FIG. 1 byway of example, the spaced vertical uprights 13 and 14 and the spacedequipment mounting structures 16 and 17 jointly constitute side wallstructures of the mounting rack interior space 18. This is so, even ifthese mounting structures have large apertures 26, since an aperturedwall is a wall nonetheless. These lateral apertures 26 permit fiberoptics or other lines or cables or wiring to be conveniently run, and tobe recurringly mounted or tied, such as at webs 27. For this reason orotherwise, the equipment mounting structures 16 and 17 may be webbed.

In the illustrated embodiments of the invention, the seismically soundskeleton structure 12 includes cross piece structures 30 and 31 bracingthe spaced vertical uprights 13 and 14 and the spaced equipment mountingstructures 16 and 17.

The lower cross piece structure may be a base structure .30 included inthe seismically sound skeleton structure 12 and carrying the spacedvertical uprights 13 and 14 and the spaced equipment mounting structures16 and 17. An excellent example of a seismically sound base structure isdisclosed in the above mentioned U.S. Pat. No. 5,004,107, which isherewith incorporated by reference herein. A bracing member 29 in FIGS.1 and 2 is indicative of the intimate interconnection of the componentsof the seismically sound skeleton structure 12. Welding may be usedextensively to brace the whole structure into one piece, so to speak.

These and other base structures in effect may have extensions 32 and 33at the spaced vertical uprights 13 and 14, extending under the spacedequipment mounting structures 16 and 17, such as seen in FIGS. 1 and 7.

According to an embodiment of the invention, the seismically soundskeleton structure 12 includes cross piece structure 31 at 14 tops ofthe spaced vertical uprights 13 and 14, opposite to the base structure30. Such cross piece structure 31 preferably has transverse extensions35 and 36 at spaced vertical uprights 13 and 14, extending over the topsof the equipment mounting structures 16 and 17. The upper exploded viewin FIG. 1 shows an example of the cross piece extension 36 composed of achannel-shaped member 37 complemented by different angle members 38 and39, welded or braced into one piece.

Further bracing is seen in the section shown in FIG. 4 for an uppercorner of the seismically sound skeleton structure wherein a strut plate40 extends at an angle 41, such as at 45 degrees to the vertical upright13 and to the cross brace 31. The cross piece structure 31 attached toand extending between the vertical uprights 13 and 14 forms a corner 42at a top 142 of each of the vertical uprights, such as shown for thevertical upright 13 in FIG. 4. Between each of these vertical uprightsand that cross piece structure there is a strut plate 40 extendinginside of that vertical upright and inside of the cross piece structurein spaced relationship to the corner 42 at an angle between each ofthese vertical uprights and that cross piece structure from a location140 on that vertical upright spaced along that vertical uprightdownwardly from that top 142 to a location 240 on the cross piecestructure 31 spaced along that cross piece structure from both of thespaced vertical uprights 13 and 14. Again, welding may be used torigidify the skeleton structure with the strut 40 and with itscounterpart in the other corner at 36.

Such bracing techniques, of course, are just some examples for providingthe seismically sound structure within the scope of the invention hereindisclosed.

In illustrated preferred embodiments of the invention, the spacedequipment mounting structures 16 and 17 have elongate mounting holearrays 43 and 44 extending in parallel to the spaced vertical uprights13 and 14, respectively. Equipment, parts or components may be mounteddirectly onto these arrays, or indirectly, such as shown at 20 and 21 inFIGS. 2 and 7 by way of example.

A related embodiment of the invention provides an equipment mountingrack 10 composed of seismically sound skeleton structure 12 havingspaced vertical uprights 13 and 14 supplemented by distinct spacedequipment mounting structures 16 and 17 having elongate first sections46 extending along these spaced vertical uprights, and elongate secondsections 47, seen particularly well in FIG. 6, extending along firstsections 46 and constituting side wall structures of mounting rackinterior space 18.

Elongate first sections 46 of the two mounting structures 16 and 17 maybe attached to vertical uprights 13 and 14, or to their above mentionedelongate partial enclosures 23 extending along such vertical uprights.

The spaced vertical uprights 13 and 14 and the spaced equipment mountingstructures 16 and 17, and particularly, their elongate second sections47, may jointly constitute side wall structures of the mounting rackinterior space 18.

In the illustrated embodiment of the invention, the spaced A equipmentmounting structures 16 and 17 have elongate third sections 48 extendingalong second sections 47. These elongate third sections 48 preferablyare spaced from and extend substantially parallel to the first sections46.

According to a preferred embodiment of the invention, the spaced firstand third sections 46 and 48 are interconnected by end plates 50 and 51extending between these spaced first and third sections at opposite endsof the equipment mounting structures, such as shown in FIGS. 1, 5 and 6.In this or any other manner within the scope of the invention, eachequipment mounting structure has a rigidifying frame structure46-50-48-51 thereabout, or about its second or main section 47. Theframe member or end plates 50 and 51 preferably are attached to or areone with that main section 47.

The distinct mounting structures 16 and 17 preferably are braced with orare at least connected to seismically sound skeleton structure, such assymbolically illustrated by a fastener 52 in FIG. 5 for one of the endplates. However, such distinct mounting structures 16 and 17 preferablyare braced or are at least connected to seismically sound skeletonstructure 12 on three sides each, such as at 46-23-13 or 14, 50-32 or 33and 51-35 or 36.

The elongate mounting hole arrays 43 and 44 of the spaced equipmentmounting structures preferably extend along or at least are at theelongate third sections 48. As seen best in FIGS. 5 and 6, the elongatemounting hole arrays 43 and 44 preferably are inwardly offset relativeto the elongate third sections 48.

A special version of the equipment mounting rack according to a furtherembodiment of the invention is shown in FIGS. 7 and 8 by way of example.

Such special version is composed of the seismically sound skeletonstructure 12 having spaced vertical uprights 13 and 14, spaced equipmentmounting structures 16 and 17 attached to that skeleton structure, suchas in any of the above mentioned manners, including intervening partialenclosure 23, and extending along vertical uprights 13 and 14, andcabinet walls 53, 54, 55, 56, etc., attached to skeleton structure 12.The equipment mounting structures 16 and 17 constitute inside thecabinet walls 53 and 54 side wall structures of the mounting rackinterior space 18. In that case, the equipment mounting structures 16and 17 and even the uprights 13 are 14 are inside walls, so to speak,and the cabinet walls 53, 54 are outside walls.

The seismically sound skeleton structure 12 includes a base structure30, carrying the spaced vertical uprights 13 and 14 and havingextensions 32 and 33 at the spaced vertical uprights extending under thespaced equipment mounting structures 16 and 17. Cabinet walls 53, 54 and55 may be attached to such base structure 30, 32 and 33.

The seismically sound skeleton structure 12 shown in FIGS. 7 and 8 alsoincludes a cross piece structure 31 at tops of the spaced verticaluprights 13 and 14 opposite said base structure 30, and such cross piecestructure again has extensions 35 and 36 at the spaced vertical uprights13 and 14 extending over the spaced equipment mounting structures 16 and17. Cabinet walls 53, 54 and 56 may be attached to such top structure31, 35, 36.

The equipment mounting rack preferably has a bottom opening 58 throughwhich fiber optics or other lines or cables can be run, such as to andfrom a so-called computer floor or other supporting structure, or simplyfrom the floor itself. Particularly suitable rigid supporting structuresare shown and described in U.S. Pat. No. 5,363,613, by coinventorRichard W. Sevier, issued Nov. 15, 1994 to assignee Hendry MechanicalWorks.

The equipment mounting rack also may have a top opening 59 through whichfiber optics or other lines or cables can be run. In fact, such lines orcables may be run to and from openings 58 and 59 through the entire rackor cabinet.

The cabinet shown in FIGS. 7 and 8 may be completed by a hinged doorstructure 60, with top and bottom plates 61 and 62 being attached to thebottom and top structures 30 and 31.

FIGS. 2 and 7 show a spacer 64 between the rear of the upright 13 orupright enclosure 23 and the cabinet walls or panels 55 and 56. Asimilar spacer may be attached to the other upright 14 or to its uprightenclosure which corresponds to upright enclosure 23. The cabinet wallsor panels 55 and 56 may be attached to such spacers 64 on each back sideof the vertical uprights 13 and 14.

A simple form of spacer is a rail with a C-shaped cross-section as seenin FIG. 2. One leg of that C-shaped cross-section is visible at 64 inFIG. 7. Alternatively, another equipment mounting structure similar tothe equipment mounting structure 16 may be provided instead between therear of the vertical upright 13 and the rear panels 55 and 56. In otherwords, the vertical upright structure 13 may be provided between twoequipment mounting structures of the type shown at 16. Similarly, thevertical upright structure 14 may be provided between two equipmentmounting structures of the type shown at 17 thereby almost doubling theinterior rack volume 18 and the equipment mounting capacity.

Various features herein disclosed have utility of their own. Forinstance, an equipment mounting rack may have a seismically soundskeleton structure having spaced vertical uprights 13 and 14, andelongate partial enclosures 23 extending along such vertical uprights,with each of these elongate partial enclosures having a main section 70extending in parallel to a main section 71 of the corresponding verticalupright 13, a first lateral section 72 extending from that main section70 in spaced relationship to a first side 73 of that vertical uprightand having a first extension 74 engaging that first side 73 of thatvertical upright, and an opposite second lateral section 75 extendingfrom the main section 70 in spaced relationship to an opposite secondside 76 of that vertical upright and having a second extension 77engaging that 14t second side 76 of that vertical upright. According tothe preferred embodiment shown in FIG. 2, the elongate partial uprightenclosure 23 has a substantially C-shaped cross-section which has thevertical upright 13 between inwardly turned ends 74 and 77 of thatC-shaped cross-section.

Spacings 78 and 79 are important to seismic stability, strength andutility of the overall vertical upright structures 13 and 14. As seen inFIG. 2, fasteners, such as fasteners 25 and 65 for equipment mountingstructure 16, for a spacer 64 or for another equipment mountingstructure instead thereof, extend into spaces 78 and 79, instead ofthrough a wall of the seismically sound structure 12, such as the wall73 or 76 of the upright 13. This not only avoids a weakening of theseismically sound structure by penetration of the uprights 13 and 14with mounting holes and fasteners, but also precludes inside ends ofsuch fasteners from penetrating into any space within uprights 13 and14. This is particularly important in cases where customers or users ofthe rack add their own equipment using their own fasteners. In suchcases, ends of such fasteners could penetrate into cables, lines,wiring, etc., at the uprights, with consequent damage and malfunction.Spaces 78 and 79 readily accommodate such projecting fastener portionswithin the scope of the invention.

This also applies to other versions within the scope of the invention.By way of example, FIG. 3 shows a version wherein a mounting plate isattached to the partial upright enclosure 23 by a fastener 25, andwherein an equipment mounting board, such as the above mentionedmounting board 20, is attached to such mounting plate by anotherfastener 63. In that case, neither fastener penetrates any wall 76 etc.of the upright 13. The same applies when equipment is directly attachedto the mounting plate 22, or even to the partial enclosure 23.

The main sections 70 and 71 of the partial enclosure 23 and upright 71may also be spaced from each other, to provide a spacing around theupright core from extension 74 to extension 77 of that partial enclosure23.

The structure thus disclosed partakes of the advantage that tubularstructures have in terms of strength and stability.

In combination with these features, or independently, an equipmentmounting rack that comprises a seismically sound skeleton structurehaving spaced vertical uprights 13 and 14 and a cross piece structure 31attached to and extending between such vertical uprights, includes astrut plate 40 extending at an angle 41 between each of these verticaluprights and that cross piece structure 31.

According to the preferred embodiment of this aspect of the inventionillustrated in FIG. 4, such strut plate extends inside of each of thevertical uprights 13 and 14 and inside of the cross piece structure.Elongate partial enclosures 23 may extend along the vertical uprights 13and 14, such as disclosed above with the aid of FIGS. 2 and 3.

Distinct spaced equipment mounting structures 16 and 17 may again beattached to the skeleton structure 12 and extend along vertical uprights13 and 14 and may, for instance, constitute side wall structures of amounting rack interior space 18.

This extensive disclosure will render apparent or suggest to thoseskilled in the art various modifications and variations within thespirit and scope of the invention.

What is claimed is:
 1. An equipment mounting rack comprising incombination: a seismically sound skeleton structure having spacedvertical uprights; each of said vertical uprights having an elongateupright partial enclosure having a main section extending in parallel toa main section of that vertical upright, a first lateral sectionextending from said main section in a spaced relationship to a firstside of that vertical upright and having a first extension engaging saidfirst side of that vertical upright, and an opposite second lateralsection extending from said main section in a spaced relationship to anopposite second side of that vertical upright and having a secondextension engaging said second side of that vertical upright; distinctspaced equipment mounting structures attached to each elongate partialupright, enclosure of said vertical uprights and constituting side wallstructures of a mounting rack interior space; and recurrent mountingholes in said elongate upright partial enclosure, rather than in saidvertical uprights.
 2. An equipment mounting rack comprising incombination: a seismically sound skeleton structure having spacedvertical uprights; each of said vertical uprights having an elongateupright partial enclosure having a main section extending in parallel toa main section of that vertical upright, a first lateral sectionextending from said main section in a spaced relationship to a firstside of that vertical upright and having a first extension engaging saidfirst side of that vertical upright, and an opposite second lateralsection extending from said main section in a spaced relationship to anopposite second side of that vertical upright and having a secondextension engaging said second side of that vertical upright; anddistinct spaced equipment mounting structures attached to each elongatepartial upright enclosure of said vertical uprights and constitutingside wall structures of a mounting rack interior space; wherein saidelongate partial enclosure has a substantially C-shaped cross sectionhaving said vertical upright between inwardly turned ends of saidC-shaped cross-section.
 3. An equipment mounting rack comprising incombination: a seismically sound skeleton structure having spacedvertical uprights; each of said vertical uprights having an elongateupright partial enclosure having a main section extending in parallel toa main section of that vertical upright, a first lateral sectionextending from said main section in a spaced relationship to a firstside of that vertical upright and having a first extension engaging saidfirst side of that vertical upright, and an opposite second lateralsection extending from said main section in a spaced relationship to anopposite second side of that vertical upright and having a secondextension engaging said second side of that vertical upright; anddistinct spaced equipment mounting structures attached to each elongatepartial upright enclosure of said vertical uprights and constitutingside wall structures of a mounting rack interior space; wherein saidseismically sound skeleton structure includes a base structure carryingsaid spaced vertical uprights.
 4. An equipment mounting rack comprisingin combination: a seismically sound skeleton structure having spacedvertical uprights; each of said vertical uprights having an elongateupright partial, enclosure having a main section extending in parallelto a main section of that vertical upright, a first lateral sectionextending from said main section in a spaced relationship to a firstside of that vertical upright and having a first extension engaging saidfirst side of that vertical upright, and an opposite second lateralsection extending from said main section in a spaced relationship to anopposite second side of that vertical upright and having a secondextension engaging said second side of that vertical upright; anddistinct spaced equipment mounting structures attached to each elongatepartial upright enclosure of said vertical uprights and constituting,side wall structures of a mounting rack interior space; wherein saidseismically sound skeleton structure includes a cross piece structure attops of said spaced vertical uprights.